package Thread2;

import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;

// 实现一个固定线程个数的线程池
class MyThreadPool{
    private BlockingQueue<Runnable> queue = null;

    public MyThreadPool(int n){
        // 初始化线程池,创建固定个数的线程
        // 使用ArrayBlockingQueue作为任务队列,容量为1000
        queue = new ArrayBlockingQueue(1000);
        // 创建 n 个 线程
        for(int i = 0; i < n; i++){
            Thread t = new Thread(() -> {
                while(true){
                    try {
                        Runnable task = queue.take();
                        task.run();
                    } catch (InterruptedException e) {
                        throw new RuntimeException(e);
                    }
                }
            });
            t.start();
        }
    }

    public void submit(Runnable task) throws InterruptedException {
        // 把任务放在队列中
        queue.put(task);
    }
}
public class Demo33 {
    public static void main(String[] args) throws InterruptedException {
        MyThreadPool threadPool = new MyThreadPool(10);
        
        // 向线程池里提交任务
        for (int i = 0; i < 100; i++) {
            int id = i;
            threadPool.submit(() -> {
                System.out.println("Hello " + id +"," + Thread.currentThread().getName());
            });
        }
    }
}
